" WFTDA member leagues are ranked monthly January through June, then bi-monthly through December. Leagues must play at least two sanctioned games to be included in WFTDA Rankings, and must complete their Division Game Play requirements to qualify for Tournament seeding. Leagues that have not yet played two sanctioned games will not appear in the rankings." - WFTDA

"These are calculated continuously, based on a carefully crafted algorithm which is routinely tweaked as shortcomings in the system manifest themselves. Flat Track Stats is driven purely by math, removing the possibility of judgment bias but increasing the difficulty of determining which bouts are most indicative of a team's actual skill." - DNN